CA2204018A1 - 2-stage underreamer - Google Patents

2-stage underreamer

Info

Publication number
CA2204018A1
CA2204018A1 CA002204018A CA2204018A CA2204018A1 CA 2204018 A1 CA2204018 A1 CA 2204018A1 CA 002204018 A CA002204018 A CA 002204018A CA 2204018 A CA2204018 A CA 2204018A CA 2204018 A1 CA2204018 A1 CA 2204018A1
Authority
CA
Canada
Prior art keywords
blades
slots
underreamer
stage
stage underreamer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002204018A
Other languages
French (fr)
Other versions
CA2204018C (en
Inventor
Bruce Mcgarian
Richard Alvin Armell
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Smith International Inc
Original Assignee
Bruce Mcgarian
Richard Alvin Armell
The Red Baron (Oil Tools Rental) Limited
Phoenix P.A. Limited
Smith International, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from GB9422022A external-priority patent/GB9422022D0/en
Application filed by Bruce Mcgarian, Richard Alvin Armell, The Red Baron (Oil Tools Rental) Limited, Phoenix P.A. Limited, Smith International, Inc. filed Critical Bruce Mcgarian
Priority to CA002534754A priority Critical patent/CA2534754C/en
Priority claimed from PCT/GB1995/002540 external-priority patent/WO1996013648A1/en
Publication of CA2204018A1 publication Critical patent/CA2204018A1/en
Application granted granted Critical
Publication of CA2204018C publication Critical patent/CA2204018C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/56—Button-type inserts
    • E21B10/567—Button-type inserts with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
    • E21B10/32—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools
    • E21B10/322—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers with expansible cutting tools cutter shifted by fluid pressure
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00—Survey of boreholes or wells
    • E21B47/09—Locating or determining the position of objects in boreholes or wells, e.g. the position of an extending arm; Identifying the free or blocked portions of pipes
    • E21B47/095—Locating or determining the position of objects in boreholes or wells, e.g. the position of an extending arm; Identifying the free or blocked portions of pipes by detecting an acoustic anomalies, e.g. using mud-pressure pulses

Abstract

A 2-stage underreamer for use in a subterranean wellbore comprises a unitary body (2) having upper and lower blades (5A, 5B) and (6A, 6B) mounted in slots (3, 4) formed perpendicular to each other in the body. Separate upper and lower piston assemblies are provided for driving the blades (5A, 5B) and (6A, 6B) respectively from a storage configuration in which they are located substantially completely within the slots (3, 4) to a use position as illustrated in the figure. The blades each preferably comprise a steel arm having mounted thereon a base of tungsten nickel cobalt matrix in which diamond and/or tungsten carbide inserts are provided. A signal is given to the surface that the blades are in their extended position by changing the mud.
CA002204018A 1994-10-31 1995-10-31 2-stage underreamer Expired - Lifetime CA2204018C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA002534754A CA2534754C (en) 1994-10-31 1995-10-31 Reaming tool

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
GB9422022A GB9422022D0 (en) 1994-10-31 1994-10-31 Two stage underreamer
GB9422022.5 1994-10-31
GBGB9505430.0A GB9505430D0 (en) 1994-10-31 1995-03-17 2-stage underreamer
GB9505430.0 1995-03-17
PCT/GB1995/002540 WO1996013648A1 (en) 1994-10-31 1995-10-31 2-stage underreamer

Related Child Applications (1)

Application Number Title Priority Date Filing Date
CA002534754A Division CA2534754C (en) 1994-10-31 1995-10-31 Reaming tool

Publications (2)

Publication Number Publication Date
CA2204018A1 true CA2204018A1 (en) 1996-05-09
CA2204018C CA2204018C (en) 2006-08-01

Family

ID=36764282

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002204018A Expired - Lifetime CA2204018C (en) 1994-10-31 1995-10-31 2-stage underreamer

Country Status (1)

Country Link
CA (1) CA2204018C (en)

Also Published As

Publication number Publication date
CA2204018C (en) 2006-08-01

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Legal Events

Date Code Title Description
EEER Examination request
MKEX Expiry

Effective date: 20151102